t1: 0 t2: 0 t3: 0 t4: 0 t5: 0 t6: 0 t7: 4 t8: 4 t9: 0 t10: 4 t11: 4 t12: 4 t13: 4 t14: 4 t15: 4 t16: 4 t17: 4 t18: 4 t19: 4 t20: 4 t21: 4 t22: 4 t23: 4 t24: 4 t25: 4 t26: 4